cdc(1) General Commands Manual cdc(1)
cdc - change delta commentary of an SCCS file
cdc -rSID [-m[mrlist]] [-y[comment]] files
The command changes the delta commentary of each named SCCS file, for the SID specified by the -r option.
The delta commentary is defined to be the Modification Request (MR) and comment information usually specified by the command (-m and -y
The commentary may consist of one or more lines, terminated by a dot in column one of a new line.
If a directory is named, behaves as though each file in the directory were specified as a named file, except non-SCCS files (last component
of the path name does not begin with s.) and unreadable files, which are silently ignored. If a name of - is given, the standard input is
read (see RESTRICTIONS). Each line of the standard input is taken to be the name of an SCCS file to be processed.
Arguments to which may appear in any order, consist of option arguments, and file names.
All the described option arguments apply independently to each named file.
-m[mrlist] Adds or deletes modification numbers. If the SCCS file has the v flag set then a list of MR numbers to be added and/or
deleted in the delta commentary of the SID specified by the -r option may be supplied. For further information, see A null
MR list has no effect.
MR entries are added to the list of MRs in the same manner as that of In order to delete an MR, precede the MR number with
the character ! (see Examples). If the MR to be deleted is currently in the list of MRs, it is removed and changed into a
comment line. A list of all deleted MRs is placed in the comment section of the delta commentary and is preceded by a com-
ment line stating that they were deleted.
If -m is not used and the standard input is a terminal, the prompt MRs? is issued on the standard output before the stan-
dard input is read. If the standard input is not a terminal, no prompt is issued. The MRs? prompt always precedes the com-
ments? prompt (see -y option).
MRs in a list are separated by blanks and/or tab characters. An unescaped new-line character terminates the MR list.
Note that if the v flag has a value it is taken to be the name of a program (or shell procedure) which validates the cor-
rectness of the MR numbers. For further information, see If a nonzero exit status is returned from the MR number validation
program, terminates and the delta commentary remains unchanged.
-rSID Specifies the SCCS Identification string of a delta for which the delta commentary is to be changed.
-y[comment] Replaces existing commentary for the delta specified by the -r option. The previous comments are kept and preceded by a
comment line stating that they were changed. A null comment has no effect.
If -y is not specified and the standard input is a terminal, the prompt comments? is issued on the standard output before
the standard input is read; if the standard input is not a terminal, no prompt is issued. A dot in column one of a new line
terminates the comment text.
Certain permissions are necessary to modify the SCCS file; generally, however, if you made the delta, you can change its delta commentary,
and if you own the file and directory you can modify the delta commentary.
This example shows how to add bl78-12345 and bl79-00001 to the MR list, remove bl77-54321 from the MR list, and add the comment ``trouble''
to delta 1.6 of s.file.
sccscdc -r1.6 -m"bl78-12345 !bl77-54321 bl79-00001" -ytrouble .file
This example does the same thing.
sccscdc -r1.6 .file
-MRs? !bl77-54321 bl78-12345 bl79-00001
If SCCS file names are supplied to the command via the standard input (- on the command line), then the -m and -y options must also be
See for explanations.
For more information, see
For more information, see
admin(1), delta(1), get(1), help(1), prs(1), sccs(1), sccsfile(5)
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